Modulation of acc synthase improves plant yield under low...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 9/88 (2006.01) C12N 15/82 (2006.01)

Patent

CA 2757581

The invention provides methods for improving plant yield, particularly under nitrogen limiting conditions. According to the invention, applicants have discovered that modulating ACC synthase activity in plants improves yield of plants, even when grown under low nitrogen conditions. The same plants, while demonstrating improved yield over non-modified plants, exhibited no deleterious effects under normal nitrogen conditions. The invention further provides methods using recombinant expression cassettes, host cells and transgenic plants.

L'invention concerne des procédés pour améliorer le rendement de plantes, en particulier dans des conditions de carence en azote. Selon l'invention, les demandeurs ont découvert que la modulation de l'activité ACC synthase dans des plantes améliore le rendement de plantes, même lorsqu'elles sont cultivées dans des conditions de carence en azote. Les mêmes plantes, tout en présentant un rendement amélioré par rapport à des plantes non modifiées, ne présentent aucun effet délétère dans des conditions normales en terme d'azote. L'invention concerne en outre des procédés utilisant des cassettes d'expression recombinantes, des cellules hôtes et des plantes transgéniques.

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